US962776A - Drawing-board attachment. - Google Patents

Description

LL Z m V A. H. MARANDA. DRAWING BOARD ATTACHMENT. APPLICATION FILED JAN. 12, 1910.

962,776. Patented June28, 1910.

UNITED STATES PATENT OFFICE.

ALBERT HARRY IVIAR-ANDA, OF PITTSBURG, PENNSYLVANIA.

DRAWING-BOARD ATTACHMENT.

To all whom it may concern:

Be it known that I, ALBERT HARRY MA- RANDA, a citizen of the United States of America, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Drawing-Board Attachments, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to drawing boards, and the object thereof is to provide a board of such class with means in a manner as hereinafter set forth and claimed to enable the convenient setting of a T-square at an angle and at the same time providing a straight edge against which the T-square can slide when it is necessary.

Further objects of the invention are to provide a drawing board with what may be termed an angle-forming attachment for T- squares and which shall be simple in its construction and arrangement, strong, durable, eflicient in its use, readily adjustable, conveniently fixed in its adjusted position, and inexpensive to manufacture.

With the foregoing and other objects in view the invention consists in the novel construction, combination and arrangement of parts as hereinafter more specifically described and illustrated in the accompanying drawings wherein is shown the preferred embodiment of the invention, but it is to be un derstood that changes, variations, and modifications can be resorted to which fall within the scope of the claims hereunto appended.

In the drawings wherein like reference characters denote corresponding parts throughout the several views, Figure 1 is a front view broken away at the center and one side of a drawing board in accordance with this invention, Fig. 2 is a section on line 22 of Fig. 1 looking in the direction of the arrow, Fig. 3 is a section on line 33 of Fig. 1 looking in the direction of the arrow, Fig. 4 is an end view, and Fig. 5 is a perspective view illustrating the adjusting screw.

Referring to the drawings in detail, 1 denotes the body portion of the board having attached to its lower face the supporting cleats 2. The body portion 1, as well as the cleats 2, can be of any suitable construction, as well as any suitable material. The cleats Specification of Letters Patent.

Application filed January 12, 1910.

2 maintain the board elevated from the support upon which the board is mounted.

Patented June 28, 1910. Serial No. 527,532.

Extending in parallelism with respect to one side of the body 1 and of a length as to project beyond the top of the board isa rule 3 capable of being adjusted to various angles with respect to the edge 4 of the body portion 1 and when adjusted adapted to set the blade of a T-square, the latter being shown in dotted lines in Fig. 1 and indicated at 5, at the angle desired, the T-square riding against the straight edge 6 of the adjustable rule 3. The rule 3 is spaced from the edge 4 of the body portion 1 as at 7, whereby the upper portion of the rule 3 can be moved against the edge 4 so that the upper portion of the rule 3 will incline toward the body portion 1. The rule 3 is pivotally-connected at its lower end to a supporting bracket 8, the latter being secured by the hold-fast devices 9 to the lower end 10 of the body portion 1 and being formed with an upwardlycurved arm 11 which projects from the end 10 and has its terminus rounded as at 12. The arm 11 has mounted thereon the rule 3; the later being L-shaped in cross section, and extending through the rule 3 and engaging in the arm 11 is a screw 13 for pivotally-connecting the lower end of the rule 3 to the said arm. The upper end of the rule 3 is formed with a longitudinally-extending slot 14 which in connection with a pin 15 having a screw-threaded end 15 forms What may be termed a pin and slot connection between the upper end of the rule 3 and an adjusting screw referred to generally by the reference character 16, Fig. 5.

Connected to the upper end 17 of the body portion 1 is a bracket 18 provided with arms 19, 20, 21, and 22. Extending through the said arms is the shank 23 of the adjusting screw 16, said shank being formed of two different diameters, that portion of reduced diameter being indicated by the reference character 24 and provided at its terminus with a stop pin 25 limiting the movement in one direction of the screw 16. That portion of the shank 23 of larger diameter is threaded as at 26 and has mounted thereon an adjusting nut 27. That portion of larger diameter of the shank terminates in a head 28 which is formed with an opening 29 through which extends the pin 15. That portion of the shank of larger diameter extends through the arms 19, 20 and 21 of the bracket 18, while the portion 24 of reduced diameter extends through the arm 22 of the said bracket. The ad usting nut 27 is arranged upon the screw-threaded portion 26 of the adjusting screw so that the nut will be positioned between the arms 20 and 21 of the bracket 18.

Interposed between the upper face of the head 28 and the rule 3 and surrounding the pin 15 is a washer 30, and mounted against the lower face of the head 28 and surrounding the pin 15 is a washer 31. The screwthreaded end 15 of the pin 15 is provided with a thumb nut 32 which when screwed home is adapted to fivedly-connect the upper end of the rule 3 to the adjusting screw 16 whereby the rule 3 will be maintained in the position to which it has been adjusted.

lVhen it is desired to adjust the rule 3, the thumb nut 32 is loosened and the screw 16 adjusted so as to move the rule 3- to the desired angle, thumb nut 32 is then screwed home whereby the rule 3 will be fixedly-secured in the position to which it has been adjusted. hen the rule 3 is adjusted by longitudinally-moving the adjusting screw 16, the lower portion of the rule 3 swings upon its pivot.

What I claim is:

1. A drawing board comprising the com bination with the body portion thereof, of anadjustable rule for settinga T-square at an angle and having a longitudinal slot at one end, means projecting from the bodyportion for pivotally-connecting the other end of the rule thereto, an adjusting screw carried by the other end of said body portion, and means extending through said slot and engaging said screw for connecting the slotted end of the rule with that end of the body portion carrying the adjusting screw whereby when the latter is shifted the rule will be adjusted and the T-square set at an angle.

2. A drawing board comprising the combination with the body portion thereof, of a bracket secured to one end and provided with a series of combined supporting and retaining arms, a bracket secured to the other end of said body portion and provided with an arm projecting from one side of the body portion, an adjustable rule for setting a T-square at an angle, said rule arranged at one side of said body portion, means for pivotally-connecting one end of said rule to said outwardly-pro ecting arm, an adjusting screw mounted in said supporting arms, a nut mounted on said screw, and a pin and slot connection between the other end of said rule and one end of said adjusting screw.

3. A drawing board comprising the com bination with the body portion thereof, of a bracket secured to one end and provided with a series of combined supporting and retaining arms, a bracket secured to the other end of said body portion and provided with an arm projecting from one side of the body portion, an adjustable rule for setting a T-square at an angle, said rule arranged at one side of said body portion, and substantially Lshaped in cross section, means for pivotally-connecting one end of said rule to said outwardly-projecting arm, an adjusting screw mounted in said supporting arms, a nut mounted on said screw, and a pin and slot connection between the other end of said rule and one end of said adjusting screw.

4. A drawing board comprising the combination with the body portion thereof, of a bracket secured to one end and provided with a series of combined supporting and retaining arms, a bracket secured to the other end of said body portion and provided with an arm projecting from one side of the body portion, an adjustable rule for setting a T-square at an angle, said rule arranged at one side of said body portion, and substantially angle-shaped in cross section, means for pivotally-connecting one end of said rule to said outwardly-projecting arm, an adjusting screw mounted in said supporting arms and having a stop at one end adapted to engage one of said arms, a nut mounted on said screw, and a pin and slot connection between the other end of said rule and one end of said adjusting screw.

In testimony whereof I atfix my signature in the presence of two witnesses.

ALBERT HARRY MARANDA.

lVitnesses A. H. RABsAo, KARL H. BUTLER.

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